Kerr County is a county located on the Edwards Plateau in the U.S. state of Texas. As of the 2020 census, its population was 52,598. Its county seat is Kerrville. The county was named by Joshua D. Brown for his fellow Kentucky native, James Kerr, a congressman of the Republic of Texas. The Kerrville, TX Micropolitan Statistical Area includes all of Kerr Cou…Kerr County is a county located on the Edwards Plateau in the U.S. state of Texas. As of the 2020 census, its population was 52,598. Its county seat is Kerrville. The county was named by Joshua D. Brown for his fellow Kentucky native, James Kerr, a congressman of the Republic of Texas. The Kerrville, TX Micropolitan Statistical Area includes all of Kerr County.